Receiver.



osc M. Lmcnann nnn'xannnn 0. new, or GEMQA, ILLINQIS.

- FiECF-IVEE.

To all whom it may concern:

Be it known that we, OscAR M. LEIGH and ALEXANDER C. REID, citizens of the United States, residing at Genoa, .in the county of Dekalb and State of Illinois, have invented a certain new and useful Improvement in Receivers,-of which thefollowing is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

.Our invention relates to head receivers,

I and has for its object the provision of a new receiver of this type having extreme lightness and providing a new and highly e1ective distribution of metal for the magnetic circuit thereof. I

Our lmproved receiver has the. permanent magnetportion of considerable length in order to insure durability and long life, and also has the permanent magnet constructed in a new way, thusto render it more efiec} tive. Furthermore our improved receiver construction permits of a simple removal and replacement of the receiver coil which 1s a' feature of especlal'mterest 1n receivers of this class as they are usually made within a confined space.

Our invention further contemplates improved structural features among which may be mentioned that the binding termi'- nals which receive the entering cord wires are so constructed that they serve at the same time as distancepiec'es for the various elements of the receiver structure.

We w1ll explain our invention more in detail by referring to the accompanying idrawing illustrating a receiver constructed in SLCCOIdiLHCG'WltlI our 1I1Vent1011,1n Wll1Cll Figure 1 is a sectional view of a receiver constructed in accordance with our inven tion; Fig. 2 a rear view of the mecha- ,nism excluding the shell, cap and diaphragm; Fig. 3 is a front view of the mechanism shown in Fig. 2, portions being broken away more clearly to reveal features of construction, and Fig. 1 is a sectional view similar to Fig. 1 with the shell, cap,

diaphragm and cord removed, illustrating the removable coil feature. 0

The structure as disclosed herein comprises the tustomary shell 1 cotiperating with the cap 2 between whose opposite faces a diaphragm 3yand the protruding annular; rim 4t ot the internal mechanism are clamped. The internal mechanism which Specification of Letters Patent.

Patented Dec. 5, 1916.

Application filed January 27 1916. Serial No. 74,699.

The permanent magnet-structure thus has.

the greatest length than can be given to it compatible with the interior dimensions of the device. The permanent magnet and the annular ring 5j'arein magnetic relation due to the distance piece 11 which is of magnetic material, and which together with said ring and the permanent magnets are held to gether by the screw 12. The magnetic circuit thus maybe said to extend from the finger 9 of the permanent magnet through the pole piece 10 into the diaphragm, from the diaphragm into the ring 5 of magnetic material, from said ring by means of the block llback to the point of opposite polarityof the said permanent magnet.

In order further to hold the structure consisting of the two parallel elements 5 and G, 7, together two binding posts 13 and ltare provided which are mounted between these two parallel elements, suitable strips of insulation 15 and 16 being provided to prevent them from touching these respective elements. Clamping screws 17 and. 18

then extend from the ring 5 to the permanent magnet 6 to hold the structure' to- I gether, and to clamp the binding posts in position.

As will be clear from Fig. 3, th binding post structures of course have an enlarged ril'ig shaped portion Where they encircle the screws 17 and 18 so that these binding posts are not short circuited with the ring 5 as readily apparent. The binding .posts furthermore carry screws 19 which clamp the cord tips 20 as these cord tips arepassed through holes 21 provided in the cylindrical extremities 22 of said binding post elements. The binding post elements furthermore have protruding fingers 23 which fit in slots provided 'in the insulating segment 16 so that said binding post elements are prevented from turning and maintain their alinement.

The coil together with end plates these skilled in i which 011.? inventien .Wardly from i and TEES an; integral sti'ne'linnsa shewn more clearl in Fig which is o 'i T612101!" like, and which. is mennteii nermali y' in place upon 'n mail-inn by Elie 1 e fpegetiier send 1%: emf

the Pisifil'kilfifiilil 2 HM I; P w- .LlRg 3. ll, .\).L.LLL J12: Ame purpose,

Tillie extreme sun will be readily has its ii ermim l, 29 pret-m men From what hes been anus Lies bed i) 1e nature 0141 invention will be r art.

Having hewever time J claim new a eesn'e ten Parent 1:3:

magnei; said ring zine finally inentetl piece of magmaliz 7 i: 7 mg, from ell-in ring; to

head receiver eemprising a rin e1" magi mine eanine a iilinpinngm QM'CUIXlffif i v entinily ei'ig'as ig said. ring, a permanent magnet. a

submntieiiy lmmiiel a a 4 m I B i K L piece extending; mrwarelly .L i am per- ;5 ne and enuully engaging said ring. 11 permanent magnet arranged. substantially paallel i0 f iilill ring buizlci's'nnlly Hil -1130f, a eentl'eliy located peie piece extemling for wardly from said, iiieifn'mnent magnet, a dis- LZLI'KUC piece (if magnetic material extending .li'mn said ring in said permanent nmgnet, an eating eeil ene'i'c-iing said pole piece, een nee a 'ie ninals eleelzi'ieally associated with the ternmiuls 01 said coil mounted between said ring and said. permanent magnet, and insulating material between said connecting erininals and said ring; and said permanent magma, sni l connecting terminals serving; as distance pieces bet ween said rin and said i-lz-nenb magnet. I A need receiver rieinpl'isingr a ring of ,netie meteiizil, a iiiaplig-egni circumfer- -y en ngingg sziiiirin permanent ingeii snlvnntialiy parallel to ring and baelmwn'dly thereof a pole eiitenrlin z 4 *dlx' L 0111 said per- ]V nianens magnet .iirl fifi said ring and iJOWSsLCi said Iliilfihl'ilgill, a (distance piece of magnetic material extending; from said ring said. perinzmnenl; em et, an actuating cling said pole spiece, connecting s; eleeizi'iczillyassociated with the terminals of said ,qeii mounted between said i'in and. said permanent magnet, and insung iimzterini bi ween said connecting and said permanent meme 5 znaigi'ieiintei'lerr item eismd (he 1h; l of: magnefiie inn:

ininziis and; 321i N, connecting terminals serving as A 0 ice pines between ring and said ring in permanent magnet; permanent magnet.

3. A I ee ver eomprii n I 7 head receiver cen'ijirising :i. ring of magnetie m2 fin, eiienhrigm eiremi net-ie nm'ieriah zidiaphragm circumfermntiaiigi engngin saicli 3:, a pert: a m-rignec filli-Ulgfil}. eu lisfmnnally peiali said and baiekweri liiy 1th e02 a, tirally lo axed pole piece 221 ii'm'fiiv "rem said pe inns 'ie'fi, u

g megneiie irmteriai ezmeiidii g is! said ring. :i, permanent J (i. Substantially parallel to eaekwamily thereof, a cengenie pine extending f0rszaie. pemmnent nmgnet, :1 dis- 1 magneie material extendingward.

,Fi'em said ring 20 said perznaneni; ring a said permanent nnignet, i 'i net'fl" saint ting eeii ezienelziig'enid pole piece,

MHufilS electrically esseeintedm W nnie if said COilIl'lOllDili-Id bei'in unzi said permanent magnet, 'liliilfil between said connecting id sai i ling said permanent .magnet z-mui con. .1 criminals serving as distance pieees iieiaweei said ring and said pe m-1m t ningnet, :UlCi means associated vl2 P nmirerinl for preventing m weal m5 eel between meg I 4i, heed .ieceiver l egnebic' zn-m'iarieh lrtiiniiy engag nn" we in said mania t ezsieezi-iien of mid cenne tingterminals.

anemia magnet arranged siitist antially parallel to said ring and backwardly thereof, a pole piece extending forwardly from said permanent magnet interiorly of said ring and toward said diaphragm, a distance piece of magnetic material extending from said-ring to said permanent magnet, an actuating coil encircling said pole piece, connecting ter-- location of said connecting terminals.

9. A head receiver comprising a. ring of magnetic material, a diaphragm circumferentially engaging said ring, a permanent magnet arranged substantially parallel to said ring and backwardly thereof, a centrally located pole piece extending forwardly from said permanent magnet, .a distance piece of magnetic material extending from said ring to said permanent magnet, and a self-contained spool of wire removably held in place upon said pole piece.

10. A head receiver comprising a ring ofmagnetic material, a diaphragm circumferentially engaging said ring, a, permanent magnet arranged substantially parallel to said ring and backwardly thereof, a pole piece extending forwardly from said permanent magnet interior-1y of said ring and toward said diaphragm, a distance piece of magnetic material extending from said ring to said permanent magnet, and a self-contained spool of wire removably held in place upon said pole piece.

11. A head receiver comprising a ring of magnetic material, a diaphragm circumferentially engaging said ring, a permanent magnet arranged substantially parallel to said ring and backwardly thereof, acentrally located pole piece extending forwardly from said permanent magnet, a distance piece of magnetic material extending from said ring to said permanent magnet, and a self-contained spool of wire removably held in place upon said pole piece, said spool having one of its ends protruding and a screwadapted to hold said spool removably in position, said screw entering said permanent magnet.

12. A head receiver comprising a ring of magnetic material, a diaphragm circumferentially engaging said ring, a permanent magnet arranged substantially parallel to said ring and backwardly thereof, a pole piece extending forwardly from said permanent magnet interiorly of said ring and toward said diaphragm, a distance piece of magnetic material extending from said ring to said permanent magnet, a self-contained spool of wire removably held in place upon said pole piece, said spool having one of its ends protruding and a screw adapted to hold said spool removably in position, said screw entering said permanent magnet.

13. A head receiver comprising a ring of magnetic material, a diaphragm circumferentially engaging said ring, a permanent magnet arranged substantially parallel to said ring and backwardly thereof, a centrally located pole piece, extending for wardly from said permanent magnet, and a distance piece of magnetic material extending from said ring to said permanent magnet, said permanent magnet consisting of a ring having a radially extending portion,

said pole piece extending forwardly from v said radial portion.

14:. A head receiver comprising a ring of magnetic material, a diaphragm circumferentially engaging said ring, a permanent magnet arranged substantially parallel to said ring and backwardly thereof, a pole piece extending forwardly from said permanent magnet interiorly of said ring and toward said diaphragm, and a distance piece of magnetic material extending from said ring to said permanent. magnet, said permanent magnet consisting of a ring having a radially extending portion, said pole piece extending forwardly from said radial portion.

In witness whereof, we hereunto subscribe our names this 25th day of January, A. D. 1916.

OSCAR M. LEIGH. ALEXANDER C. REID. Witnesses:

MAX W. ZABEL, HAZEL A. Jonas. 

